Merge pull request #122 from inokawa/patch-1

Fix typo in README.md

README.md

@@ -255,7 +255,7 @@ If the target value is null, the style is removed when the transition starts. Ot
 
 To apply a different interpolator, use [*transition*.styleTween](#transition_styleTween).
 
-<a name="transition_styleTween" href="#transition_styleTween">#</a> <i>transition</i>.<b>styleTween</b>(<i>name</i>[, <i>factory</i>[, <i>priority</i>]])) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/styleTween.js)
+<a name="transition_styleTween" href="#transition_styleTween">#</a> <i>transition</i>.<b>styleTween</b>(<i>name</i>[, <i>factory</i>[, <i>priority</i>]]) · [Source](https://github.com/d3/d3-transition/blob/master/src/transition/styleTween.js)
 
 If *factory* is specified and not null, assigns the style [tween](#transition_tween) for the style with the specified *name* to the specified interpolator *factory*. An interpolator factory is a function that returns an [interpolator](https://github.com/d3/d3-interpolate); when the transition starts, the *factory* is evaluated for each selected element, in order, being passed the current datum (*d*), the current index (*i*), and the current group (*nodes*), with *this* as the current DOM element. The returned interpolator will then be invoked for each frame of the transition, in order, being passed the [eased](#transition_ease) time *t*, typically in the range [0, 1]. Lastly, the return value of the interpolator will be used to set the style value with the specified *priority*. The interpolator must return a string. (To remove an style at the start of a transition, use [*transition*.style](#transition_style); to remove an style at the end of a transition, use [*transition*.on](#transition_on) to listen for the *end* event.)